Air is the most essential thing for life زندگی کیلئے سب سے اہم چیز ہوا ہے
Generally, article the is used for a superlative degree of adjective.
"Old" starts with a vowel sound, so we use "an" before it.
Correct sentence: "Is your mother working in an old office building?"
The definite article (the) is used before a noun to indicate that the identity of the noun is known to the reader.
The young dog is called a puppy.
"The" is used before a specific noun that is known to the listener/reader — here, it's the specific teacher who taught us Science.
It implies there is only one particular teacher being referred to, making the definite article "the" appropriate.
"The" is used for something specific already known to the speaker and listener.
Since the USB drive was already mentioned ("I lent you last week"), "the" is correct.
The is used between speak and truth.
Speak the truth means سچ بولنا
Note:- If two verbs/adjectives etc take two different prepositions, we must use appropriate prepositions along with the verb/adjective.
Mr. Aslam is senior to and older than Mr. Sajad.
"An" is used before words starting with a vowel sound.
"Important" begins with a vowel sound (/ɪ/), so "an" is appropriate.
"A" is used before consonant sounds.
